diff --git a/include/zephyr/net/coap.h b/include/zephyr/net/coap.h
index d06a7b23dcd..747def6a372 100644
--- a/include/zephyr/net/coap.h
+++ b/include/zephyr/net/coap.h
@@ -259,6 +259,9 @@ struct coap_option {
  * @typedef coap_reply_t
  * @brief Helper function to be called when a response matches the
  * a pending request.
+ * When sending blocks, the callback is only executed when the
+ * reply of the last block is received.
+ * i.e. it is not called when the code of the reply is 'continue' (2.31).
  */
 typedef int (*coap_reply_t)(const struct coap_packet *response,
 			    struct coap_reply *reply,
diff --git a/subsys/net/lib/coap/coap.c b/subsys/net/lib/coap/coap.c
index a4dab38eee8..5b0da6d9bc5 100644
--- a/subsys/net/lib/coap/coap.c
+++ b/subsys/net/lib/coap/coap.c
@@ -1499,7 +1499,9 @@ struct coap_reply *coap_response_received(
 		/* handle observed requests only if received in order */
 		if (age == -ENOENT || is_newer(r->age, age)) {
 			r->age = age;
-			r->reply(response, r, from);
+			if (coap_header_get_code(response) != COAP_RESPONSE_CODE_CONTINUE) {
+				r->reply(response, r, from);
+			}
 		}
 
 		return r;